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76
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10 #include <ngx_imap.h>
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11
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12
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96
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13 static void ngx_imap_init_session(ngx_connection_t *c);
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90
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14 static void ngx_imap_init_protocol(ngx_event_t *rev);
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76
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15 static ngx_int_t ngx_imap_read_command(ngx_imap_session_t *s);
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90
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16 static u_char *ngx_imap_log_error(ngx_log_t *log, u_char *buf, size_t len);
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76
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17
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88
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18 #if (NGX_IMAP_SSL)
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132
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19 static void ngx_imap_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c);
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96
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20 static void ngx_imap_ssl_handshake_handler(ngx_connection_t *c);
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88
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21 #endif
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22
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76
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23
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24 static ngx_str_t greetings[] = {
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25 ngx_string("+OK POP3 ready" CRLF),
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78
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26 ngx_string("* OK IMAP4 ready" CRLF)
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76
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27 };
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28
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29 static ngx_str_t internal_server_errors[] = {
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30 ngx_string("-ERR internal server error" CRLF),
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31 ngx_string("* BAD internal server error" CRLF),
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32 };
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33
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34 static u_char pop3_ok[] = "+OK" CRLF;
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35 static u_char pop3_invalid_command[] = "-ERR invalid command" CRLF;
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36
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92
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37 static u_char imap_star[] = "* ";
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78
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38 static u_char imap_ok[] = "OK completed" CRLF;
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76
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39 static u_char imap_next[] = "+ OK" CRLF;
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40 static u_char imap_bye[] = "* BYE" CRLF;
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41 static u_char imap_invalid_command[] = "BAD invalid command" CRLF;
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42
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43
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44 void
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45 ngx_imap_init_connection(ngx_connection_t *c)
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46 {
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190
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47 in_addr_t in_addr;
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48 socklen_t len;
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49 ngx_uint_t i;
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50 struct sockaddr_in sin;
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51 ngx_imap_log_ctx_t *ctx;
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52 ngx_imap_in_port_t *imip;
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53 ngx_imap_in_addr_t *imia;
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54 ngx_imap_session_t *s;
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92
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55 #if (NGX_IMAP_SSL)
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132
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56 ngx_imap_ssl_conf_t *sslcf;
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92
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57 #endif
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90
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58
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190
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59
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60 /* find the server configuration for the address:port */
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61
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62 /* AF_INET only */
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63
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64 imip = c->listening->servers;
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65 imia = imip->addrs;
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66
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67 i = 0;
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68
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69 if (imip->naddrs > 1) {
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70
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71 /*
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72 * There are several addresses on this port and one of them
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73 * is the "*:port" wildcard so getsockname() is needed to determine
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74 * the server address.
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75 *
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76 * AcceptEx() already gave this address.
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77 */
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78
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79 #if (NGX_WIN32)
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80 if (c->local_sockaddr) {
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81 in_addr =
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82 ((struct sockaddr_in *) c->local_sockaddr)->sin_addr.s_addr;
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90
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83
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190
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84 } else
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85 #endif
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86 {
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87 len = sizeof(struct sockaddr_in);
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88 if (getsockname(c->fd, (struct sockaddr *) &sin, &len) == -1) {
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89 ngx_connection_error(c, ngx_socket_errno,
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90 "getsockname() failed");
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91 ngx_imap_close_connection(c);
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92 return;
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93 }
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94
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95 in_addr = sin.sin_addr.s_addr;
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96 }
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97
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98 /* the last address is "*" */
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99
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100 for ( /* void */ ; i < imip->naddrs - 1; i++) {
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101 if (in_addr == imia[i].addr) {
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102 break;
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103 }
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104 }
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105 }
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106
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107
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108 s = ngx_pcalloc(c->pool, sizeof(ngx_imap_session_t));
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109 if (s == NULL) {
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90
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110 ngx_imap_close_connection(c);
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111 return;
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126
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112 }
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90
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113
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190
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114 s->main_conf = imia[i].ctx->main_conf;
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115 s->srv_conf = imia[i].ctx->srv_conf;
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116
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117 s->addr_text = &imia[i].addr_text;
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118
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119 c->data = s;
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120 s->connection = c;
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121
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122 ngx_log_error(NGX_LOG_INFO, c->log, 0, "*%ui client %V connected to %V",
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123 c->number, &c->addr_text, s->addr_text);
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124
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125 ctx = ngx_palloc(c->pool, sizeof(ngx_imap_log_ctx_t));
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126 if (ctx == NULL) {
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127 ngx_imap_close_connection(c);
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128 return;
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129 }
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130
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131 ctx->client = &c->addr_text;
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132 ctx->session = s;
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90
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133
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134 c->log->connection = c->number;
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135 c->log->handler = ngx_imap_log_error;
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190
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136 c->log->data = ctx;
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90
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137 c->log->action = "sending client greeting line";
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138
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139 c->log_error = NGX_ERROR_INFO;
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140
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92
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141 #if (NGX_IMAP_SSL)
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142
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190
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143 sslcf = ngx_imap_get_module_srv_conf(s, ngx_imap_ssl_module);
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92
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144
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145 if (sslcf->enable) {
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132
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146 ngx_imap_ssl_init_connection(&sslcf->ssl, c);
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96
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147 return;
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92
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148 }
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149
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150 #endif
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151
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96
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152 ngx_imap_init_session(c);
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90
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153 }
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154
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155
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96
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156 #if (NGX_IMAP_SSL)
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157
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90
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158 static void
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132
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159 ngx_imap_starttls_handler(ngx_event_t *rev)
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160 {
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161 ngx_connection_t *c;
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162 ngx_imap_session_t *s;
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163 ngx_imap_ssl_conf_t *sslcf;
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164
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165 c = rev->data;
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166 s = c->data;
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190
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167 s->starttls = 1;
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132
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168
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169 c->log->action = "in starttls state";
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170
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171 sslcf = ngx_imap_get_module_srv_conf(s, ngx_imap_ssl_module);
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172
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173 ngx_imap_ssl_init_connection(&sslcf->ssl, c);
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174 }
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175
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176
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177 static void
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178 ngx_imap_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c)
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179 {
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190
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180 ngx_imap_session_t *s;
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132
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181 ngx_imap_core_srv_conf_t *cscf;
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182
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183 if (ngx_ssl_create_connection(ssl, c, 0) == NGX_ERROR) {
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184 ngx_imap_close_connection(c);
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185 return;
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186 }
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187
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188 if (ngx_ssl_handshake(c) == NGX_AGAIN) {
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189
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190
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190 s = c->data;
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191
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192 cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module);
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132
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193
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194 ngx_add_timer(c->read, cscf->timeout);
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195
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196 c->ssl->handler = ngx_imap_ssl_handshake_handler;
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197
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198 return;
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199 }
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200
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201 ngx_imap_ssl_handshake_handler(c);
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202 }
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203
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204
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205 static void
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96
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206 ngx_imap_ssl_handshake_handler(ngx_connection_t *c)
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126
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207 {
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190
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208 ngx_imap_session_t *s;
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209
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96
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210 if (c->ssl->handshaked) {
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132
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211
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190
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212 s = c->data;
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213
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214 if (s->starttls) {
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132
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215 c->read->handler = ngx_imap_init_protocol;
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216 c->write->handler = ngx_imap_send;
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217
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218 ngx_imap_init_protocol(c->read);
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219
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220 return;
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221 }
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222
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96
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223 ngx_imap_init_session(c);
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224 return;
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225 }
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226
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227 ngx_imap_close_connection(c);
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228 }
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229
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230 #endif
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231
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232
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233 static void
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234 ngx_imap_init_session(ngx_connection_t *c)
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90
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235 {
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88
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236 ngx_imap_session_t *s;
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90
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237 ngx_imap_core_srv_conf_t *cscf;
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76
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238
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96
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239 c->read->handler = ngx_imap_init_protocol;
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240 c->write->handler = ngx_imap_send;
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88
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241
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190
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242 s = c->data;
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76
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243
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190
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244 cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module);
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88
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245
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246 s->protocol = cscf->protocol;
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247
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248 s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_imap_max_module);
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249 if (s->ctx == NULL) {
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250 ngx_imap_session_internal_server_error(s);
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251 return;
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252 }
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253
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254 s->out = greetings[s->protocol];
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255
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96
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256 ngx_add_timer(c->read, cscf->timeout);
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76
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257
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96
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258 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
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76
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259 ngx_imap_close_connection(c);
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260 }
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88
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261
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262 ngx_imap_send(c->write);
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263 }
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264
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265
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266 void
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267 ngx_imap_send(ngx_event_t *wev)
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268 {
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90
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269 ngx_int_t n;
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270 ngx_connection_t *c;
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271 ngx_imap_session_t *s;
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272 ngx_imap_core_srv_conf_t *cscf;
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88
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273
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274 c = wev->data;
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275 s = c->data;
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276
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277 if (wev->timedout) {
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278 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
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126
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279 c->timedout = 1;
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88
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280 ngx_imap_close_connection(c);
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281 return;
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282 }
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283
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284 if (s->out.len == 0) {
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285 if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) {
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286 ngx_imap_close_connection(c);
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287 }
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288
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289 return;
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290 }
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291
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292 n = c->send(c, s->out.data, s->out.len);
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293
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294 if (n > 0) {
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295 s->out.len -= n;
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296
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90
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297 if (wev->timer_set) {
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298 ngx_del_timer(wev);
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299 }
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300
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88
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301 if (s->quit) {
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302 ngx_imap_close_connection(c);
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303 return;
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304 }
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305
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306 if (s->blocked) {
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307 c->read->handler(c->read);
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308 }
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309
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310 return;
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311 }
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312
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313 if (n == NGX_ERROR) {
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314 ngx_imap_close_connection(c);
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315 return;
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316 }
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317
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318 /* n == NGX_AGAIN */
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319
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90
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320 cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module);
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321
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322 ngx_add_timer(c->write, cscf->timeout);
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323
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88
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324 if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) {
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325 ngx_imap_close_connection(c);
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326 return;
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327 }
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76
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328 }
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329
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330
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331 static void
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90
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332 ngx_imap_init_protocol(ngx_event_t *rev)
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76
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333 {
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334 size_t size;
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335 ngx_connection_t *c;
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336 ngx_imap_session_t *s;
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337 ngx_imap_core_srv_conf_t *cscf;
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338
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339 c = rev->data;
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340
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90
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341 c->log->action = "in auth state";
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342
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76
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343 if (rev->timedout) {
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344 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
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126
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345 c->timedout = 1;
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76
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346 ngx_imap_close_connection(c);
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347 return;
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348 }
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349
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88
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350 s = c->data;
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76
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351
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88
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352 if (s->protocol == NGX_IMAP_POP3_PROTOCOL) {
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76
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353 size = 128;
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354 s->imap_state = ngx_pop3_start;
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355 c->read->handler = ngx_pop3_auth_state;
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356
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357 } else {
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88
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358 cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module);
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76
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359 size = cscf->imap_client_buffer_size;
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360 s->imap_state = ngx_imap_start;
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361 c->read->handler = ngx_imap_auth_state;
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362 }
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363
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364 if (s->buffer == NULL) {
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132
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365 if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t))
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366 == NGX_ERROR)
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367 {
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368 ngx_imap_session_internal_server_error(s);
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369 return;
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370 }
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371
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372 s->buffer = ngx_create_temp_buf(c->pool, size);
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373 if (s->buffer == NULL) {
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374 ngx_imap_session_internal_server_error(s);
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375 return;
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376 }
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76
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377 }
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378
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379 c->read->handler(rev);
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380 }
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381
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382
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383 void
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384 ngx_imap_auth_state(ngx_event_t *rev)
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385 {
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92
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386 u_char *text, *last, *p, *dst, *src, *end;
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88
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387 ssize_t text_len, last_len;
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76
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388 ngx_str_t *arg;
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389 ngx_int_t rc;
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92
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390 ngx_uint_t tag, i;
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76
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391 ngx_connection_t *c;
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392 ngx_imap_session_t *s;
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393 ngx_imap_core_srv_conf_t *cscf;
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132
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394 #if (NGX_IMAP_SSL)
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395 ngx_imap_ssl_conf_t *sslcf;
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396 #endif
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76
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397
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398 c = rev->data;
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399 s = c->data;
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400
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401 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, c->log, 0, "imap auth state");
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402
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403 if (rev->timedout) {
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|
|
404 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
|
|
126
|
405 c->timedout = 1;
|
|
76
|
406 ngx_imap_close_connection(c);
|
|
|
407 return;
|
|
|
408 }
|
|
|
409
|
|
88
|
410 if (s->out.len) {
|
|
|
411 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, c->log, 0, "imap send handler busy");
|
|
|
412 s->blocked = 1;
|
|
|
413 return;
|
|
|
414 }
|
|
|
415
|
|
|
416 s->blocked = 0;
|
|
|
417
|
|
76
|
418 rc = ngx_imap_read_command(s);
|
|
|
419
|
|
|
420 ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0, "imap auth: %i", rc);
|
|
|
421
|
|
|
422 if (rc == NGX_AGAIN || rc == NGX_ERROR) {
|
|
|
423 return;
|
|
|
424 }
|
|
|
425
|
|
|
426 tag = 1;
|
|
|
427
|
|
|
428 text = NULL;
|
|
|
429 text_len = 0;
|
|
|
430
|
|
|
431 last = imap_ok;
|
|
|
432 last_len = sizeof(imap_ok) - 1;
|
|
|
433
|
|
|
434 if (rc == NGX_OK) {
|
|
|
435
|
|
|
436 ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0, "imap auth command: %i",
|
|
|
437 s->command);
|
|
|
438
|
|
92
|
439 if (s->backslash) {
|
|
|
440
|
|
|
441 arg = s->args.elts;
|
|
|
442
|
|
|
443 for (i = 0; i < s->args.nelts; i++) {
|
|
|
444 dst = arg[i].data;
|
|
|
445 end = dst + arg[i].len;
|
|
|
446
|
|
|
447 for (src = dst; src < end; dst++) {
|
|
|
448 *dst = *src;
|
|
|
449 if (*src++ == '\\') {
|
|
|
450 *dst = *src++;
|
|
|
451 }
|
|
|
452 }
|
|
|
453
|
|
|
454 arg[i].len = dst - arg[i].data;
|
|
|
455 }
|
|
|
456
|
|
|
457 s->backslash = 0;
|
|
|
458 }
|
|
|
459
|
|
76
|
460 switch (s->command) {
|
|
|
461
|
|
|
462 case NGX_IMAP_LOGIN:
|
|
132
|
463
|
|
|
464 #if (NGX_IMAP_SSL)
|
|
|
465
|
|
|
466 if (c->ssl == NULL) {
|
|
|
467 sslcf = ngx_imap_get_module_srv_conf(s, ngx_imap_ssl_module);
|
|
|
468
|
|
|
469 if (sslcf->starttls == NGX_IMAP_STARTTLS_ONLY) {
|
|
|
470 rc = NGX_IMAP_PARSE_INVALID_COMMAND;
|
|
|
471 break;
|
|
|
472 }
|
|
|
473 }
|
|
|
474 #endif
|
|
|
475
|
|
118
|
476 arg = s->args.elts;
|
|
76
|
477
|
|
118
|
478 if (s->args.nelts == 2 && arg[0].len) {
|
|
76
|
479
|
|
|
480 s->login.len = arg[0].len;
|
|
|
481 s->login.data = ngx_palloc(c->pool, s->login.len);
|
|
|
482 if (s->login.data == NULL) {
|
|
|
483 ngx_imap_session_internal_server_error(s);
|
|
|
484 return;
|
|
|
485 }
|
|
|
486
|
|
|
487 ngx_memcpy(s->login.data, arg[0].data, s->login.len);
|
|
|
488
|
|
|
489 s->passwd.len = arg[1].len;
|
|
|
490 s->passwd.data = ngx_palloc(c->pool, s->passwd.len);
|
|
|
491 if (s->passwd.data == NULL) {
|
|
|
492 ngx_imap_session_internal_server_error(s);
|
|
|
493 return;
|
|
|
494 }
|
|
|
495
|
|
|
496 ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len);
|
|
|
497
|
|
96
|
498 #if (NGX_DEBUG_IMAP_PASSWD)
|
|
76
|
499 ngx_log_debug2(NGX_LOG_DEBUG_IMAP, c->log, 0,
|
|
|
500 "imap login:\"%V\" passwd:\"%V\"",
|
|
|
501 &s->login, &s->passwd);
|
|
96
|
502 #else
|
|
|
503 ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0,
|
|
|
504 "imap login:\"%V\"", &s->login);
|
|
|
505 #endif
|
|
76
|
506
|
|
|
507 s->args.nelts = 0;
|
|
|
508 s->buffer->pos = s->buffer->start;
|
|
|
509 s->buffer->last = s->buffer->start;
|
|
|
510
|
|
|
511 if (rev->timer_set) {
|
|
|
512 ngx_del_timer(rev);
|
|
|
513 }
|
|
|
514
|
|
|
515 s->login_attempt++;
|
|
|
516
|
|
|
517 ngx_imap_auth_http_init(s);
|
|
|
518
|
|
|
519 return;
|
|
|
520
|
|
|
521 } else {
|
|
|
522 rc = NGX_IMAP_PARSE_INVALID_COMMAND;
|
|
|
523 }
|
|
|
524
|
|
|
525 break;
|
|
|
526
|
|
|
527 case NGX_IMAP_CAPABILITY:
|
|
|
528 cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module);
|
|
132
|
529
|
|
|
530 #if (NGX_IMAP_SSL)
|
|
|
531
|
|
|
532 if (c->ssl == NULL) {
|
|
|
533 sslcf = ngx_imap_get_module_srv_conf(s, ngx_imap_ssl_module);
|
|
|
534
|
|
|
535 if (sslcf->starttls == NGX_IMAP_STARTTLS_ON) {
|
|
|
536 text_len = cscf->imap_starttls_capability.len;
|
|
|
537 text = cscf->imap_starttls_capability.data;
|
|
|
538 break;
|
|
|
539 }
|
|
|
540
|
|
|
541 if (sslcf->starttls == NGX_IMAP_STARTTLS_ONLY) {
|
|
|
542 text_len = cscf->imap_starttls_only_capability.len;
|
|
|
543 text = cscf->imap_starttls_only_capability.data;
|
|
|
544 break;
|
|
|
545 }
|
|
|
546 }
|
|
|
547 #endif
|
|
|
548
|
|
|
549 text_len = cscf->imap_capability.len;
|
|
|
550 text = cscf->imap_capability.data;
|
|
76
|
551 break;
|
|
|
552
|
|
|
553 case NGX_IMAP_LOGOUT:
|
|
88
|
554 s->quit = 1;
|
|
76
|
555 text = imap_bye;
|
|
|
556 text_len = sizeof(imap_bye) - 1;
|
|
|
557 break;
|
|
|
558
|
|
|
559 case NGX_IMAP_NOOP:
|
|
|
560 break;
|
|
|
561
|
|
132
|
562 #if (NGX_IMAP_SSL)
|
|
|
563
|
|
|
564 case NGX_IMAP_STARTTLS:
|
|
|
565 if (c->ssl == NULL) {
|
|
|
566 sslcf = ngx_imap_get_module_srv_conf(s, ngx_imap_ssl_module);
|
|
|
567 if (sslcf->starttls) {
|
|
|
568 c->read->handler = ngx_imap_starttls_handler;
|
|
|
569 break;
|
|
|
570 }
|
|
|
571 }
|
|
|
572
|
|
|
573 rc = NGX_IMAP_PARSE_INVALID_COMMAND;
|
|
|
574 break;
|
|
|
575 #endif
|
|
|
576
|
|
76
|
577 default:
|
|
|
578 rc = NGX_IMAP_PARSE_INVALID_COMMAND;
|
|
|
579 break;
|
|
|
580 }
|
|
|
581
|
|
|
582 } else if (rc == NGX_IMAP_NEXT) {
|
|
|
583 last = imap_next;
|
|
|
584 last_len = sizeof(imap_next) - 1;
|
|
|
585 tag = 0;
|
|
|
586 }
|
|
|
587
|
|
|
588 if (rc == NGX_IMAP_PARSE_INVALID_COMMAND) {
|
|
|
589 last = imap_invalid_command;
|
|
|
590 last_len = sizeof(imap_invalid_command) - 1;
|
|
|
591 }
|
|
|
592
|
|
|
593 if (tag) {
|
|
92
|
594 if (s->tag.len == 0) {
|
|
|
595 s->tag.len = sizeof(imap_star) - 1;
|
|
|
596 s->tag.data = (u_char *) imap_star;
|
|
|
597 }
|
|
|
598
|
|
88
|
599 if (s->tagged_line.len < s->tag.len + text_len + last_len) {
|
|
|
600 s->tagged_line.len = s->tag.len + text_len + last_len;
|
|
|
601 s->tagged_line.data = ngx_palloc(c->pool, s->tagged_line.len);
|
|
|
602 if (s->tagged_line.data == NULL) {
|
|
76
|
603 ngx_imap_close_connection(c);
|
|
|
604 return;
|
|
|
605 }
|
|
|
606 }
|
|
|
607
|
|
88
|
608 s->out.data = s->tagged_line.data;
|
|
|
609 s->out.len = s->tag.len + text_len + last_len;
|
|
|
610
|
|
|
611 p = s->out.data;
|
|
76
|
612
|
|
|
613 if (text) {
|
|
|
614 p = ngx_cpymem(p, text, text_len);
|
|
|
615 }
|
|
|
616 p = ngx_cpymem(p, s->tag.data, s->tag.len);
|
|
|
617 ngx_memcpy(p, last, last_len);
|
|
|
618
|
|
|
619
|
|
|
620 } else {
|
|
88
|
621 s->out.data = last;
|
|
|
622 s->out.len = last_len;
|
|
76
|
623 }
|
|
|
624
|
|
88
|
625 if (rc != NGX_IMAP_NEXT) {
|
|
|
626 s->args.nelts = 0;
|
|
|
627 s->buffer->pos = s->buffer->start;
|
|
|
628 s->buffer->last = s->buffer->start;
|
|
|
629 s->tag.len = 0;
|
|
76
|
630 }
|
|
|
631
|
|
88
|
632 ngx_imap_send(c->write);
|
|
76
|
633 }
|
|
|
634
|
|
|
635
|
|
|
636 void
|
|
|
637 ngx_pop3_auth_state(ngx_event_t *rev)
|
|
|
638 {
|
|
|
639 u_char *text;
|
|
|
640 ssize_t size;
|
|
|
641 ngx_int_t rc;
|
|
|
642 ngx_str_t *arg;
|
|
|
643 ngx_connection_t *c;
|
|
|
644 ngx_imap_session_t *s;
|
|
|
645 ngx_imap_core_srv_conf_t *cscf;
|
|
132
|
646 #if (NGX_IMAP_SSL)
|
|
|
647 ngx_imap_ssl_conf_t *sslcf;
|
|
|
648 #endif
|
|
76
|
649
|
|
|
650 c = rev->data;
|
|
|
651 s = c->data;
|
|
|
652
|
|
|
653 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, c->log, 0, "pop3 auth state");
|
|
|
654
|
|
|
655 if (rev->timedout) {
|
|
|
656 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
|
|
126
|
657 c->timedout = 1;
|
|
76
|
658 ngx_imap_close_connection(c);
|
|
|
659 return;
|
|
|
660 }
|
|
|
661
|
|
88
|
662 if (s->out.len) {
|
|
|
663 ngx_log_debug0(NGX_LOG_DEBUG_IMAP, c->log, 0, "imap send handler busy");
|
|
|
664 s->blocked = 1;
|
|
|
665 return;
|
|
|
666 }
|
|
|
667
|
|
|
668 s->blocked = 0;
|
|
|
669
|
|
76
|
670 rc = ngx_imap_read_command(s);
|
|
|
671
|
|
|
672 if (rc == NGX_AGAIN || rc == NGX_ERROR) {
|
|
|
673 return;
|
|
|
674 }
|
|
|
675
|
|
|
676 text = pop3_ok;
|
|
|
677 size = sizeof(pop3_ok) - 1;
|
|
|
678
|
|
|
679 if (rc == NGX_OK) {
|
|
|
680 switch (s->imap_state) {
|
|
|
681
|
|
|
682 case ngx_pop3_start:
|
|
|
683
|
|
|
684 switch (s->command) {
|
|
|
685
|
|
|
686 case NGX_POP3_USER:
|
|
|
687 if (s->args.nelts == 1) {
|
|
|
688 s->imap_state = ngx_pop3_user;
|
|
|
689
|
|
|
690 arg = s->args.elts;
|
|
|
691 s->login.len = arg[0].len;
|
|
|
692 s->login.data = ngx_palloc(c->pool, s->login.len);
|
|
|
693 if (s->login.data == NULL) {
|
|
|
694 ngx_imap_session_internal_server_error(s);
|
|
|
695 return;
|
|
|
696 }
|
|
|
697
|
|
|
698 ngx_memcpy(s->login.data, arg[0].data, s->login.len);
|
|
|
699
|
|
|
700 ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0,
|
|
|
701 "pop3 login: \"%V\"", &s->login);
|
|
|
702
|
|
|
703 } else {
|
|
|
704 rc = NGX_IMAP_PARSE_INVALID_COMMAND;
|
|
|
705 }
|
|
|
706
|
|
|
707 break;
|
|
|
708
|
|
|
709 case NGX_POP3_CAPA:
|
|
|
710 cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module);
|
|
132
|
711
|
|
|
712 #if (NGX_IMAP_SSL)
|
|
|
713
|
|
|
714 if (c->ssl == NULL) {
|
|
|
715 sslcf = ngx_imap_get_module_srv_conf(s,
|
|
|
716 ngx_imap_ssl_module);
|
|
|
717 if (sslcf->starttls) {
|
|
|
718 size = cscf->pop3_starttls_capability.len;
|
|
|
719 text = cscf->pop3_starttls_capability.data;
|
|
|
720 break;
|
|
|
721 }
|
|
|
722 }
|
|
|
723 #endif
|
|
|
724
|
|
|
725 size = cscf->pop3_capability.len;
|
|
|
726 text = cscf->pop3_capability.data;
|
|
76
|
727 break;
|
|
|
728
|
|
|
729 case NGX_POP3_QUIT:
|
|
88
|
730 s->quit = 1;
|
|
76
|
731 break;
|
|
|
732
|
|
|
733 case NGX_POP3_NOOP:
|
|
|
734 break;
|
|
|
735
|
|
132
|
736 #if (NGX_IMAP_SSL)
|
|
|
737
|
|
|
738 case NGX_POP3_STLS:
|
|
|
739 if (c->ssl == NULL) {
|
|
|
740 sslcf = ngx_imap_get_module_srv_conf(s,
|
|
|
741 ngx_imap_ssl_module);
|
|
|
742 if (sslcf->starttls) {
|
|
|
743 c->read->handler = ngx_imap_starttls_handler;
|
|
|
744 break;
|
|
|
745 }
|
|
|
746 }
|
|
|
747
|
|
|
748 rc = NGX_IMAP_PARSE_INVALID_COMMAND;
|
|
|
749 break;
|
|
|
750 #endif
|
|
|
751
|
|
76
|
752 default:
|
|
|
753 s->imap_state = ngx_pop3_start;
|
|
|
754 rc = NGX_IMAP_PARSE_INVALID_COMMAND;
|
|
|
755 break;
|
|
|
756 }
|
|
|
757
|
|
|
758 break;
|
|
|
759
|
|
|
760 case ngx_pop3_user:
|
|
|
761
|
|
|
762 switch (s->command) {
|
|
|
763
|
|
|
764 case NGX_POP3_PASS:
|
|
|
765 if (s->args.nelts == 1) {
|
|
|
766 /* STUB */ s->imap_state = ngx_pop3_start;
|
|
|
767
|
|
|
768 arg = s->args.elts;
|
|
|
769 s->passwd.len = arg[0].len;
|
|
|
770 s->passwd.data = ngx_palloc(c->pool, s->passwd.len);
|
|
|
771 if (s->passwd.data == NULL) {
|
|
|
772 ngx_imap_session_internal_server_error(s);
|
|
|
773 return;
|
|
|
774 }
|
|
|
775
|
|
|
776 ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len);
|
|
|
777
|
|
96
|
778 #if (NGX_DEBUG_IMAP_PASSWD)
|
|
76
|
779 ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0,
|
|
|
780 "pop3 passwd: \"%V\"", &s->passwd);
|
|
96
|
781 #endif
|
|
76
|
782
|
|
|
783 s->args.nelts = 0;
|
|
|
784 s->buffer->pos = s->buffer->start;
|
|
|
785 s->buffer->last = s->buffer->start;
|
|
|
786
|
|
|
787 if (rev->timer_set) {
|
|
|
788 ngx_del_timer(rev);
|
|
|
789 }
|
|
|
790
|
|
|
791 ngx_imap_auth_http_init(s);
|
|
|
792
|
|
|
793 return;
|
|
|
794
|
|
|
795 } else {
|
|
|
796 rc = NGX_IMAP_PARSE_INVALID_COMMAND;
|
|
|
797 }
|
|
|
798
|
|
|
799 break;
|
|
|
800
|
|
|
801 case NGX_POP3_CAPA:
|
|
|
802 cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module);
|
|
132
|
803 size = cscf->pop3_capability.len;
|
|
|
804 text = cscf->pop3_capability.data;
|
|
76
|
805 break;
|
|
|
806
|
|
|
807 case NGX_POP3_QUIT:
|
|
88
|
808 s->quit = 1;
|
|
76
|
809 break;
|
|
|
810
|
|
|
811 case NGX_POP3_NOOP:
|
|
|
812 break;
|
|
|
813
|
|
|
814 default:
|
|
|
815 s->imap_state = ngx_pop3_start;
|
|
|
816 rc = NGX_IMAP_PARSE_INVALID_COMMAND;
|
|
|
817 break;
|
|
|
818 }
|
|
|
819
|
|
|
820 break;
|
|
|
821
|
|
|
822 /* suppress warinings */
|
|
|
823 case ngx_pop3_passwd:
|
|
|
824 break;
|
|
|
825 }
|
|
|
826 }
|
|
|
827
|
|
|
828 if (rc == NGX_IMAP_PARSE_INVALID_COMMAND) {
|
|
|
829 text = pop3_invalid_command;
|
|
|
830 size = sizeof(pop3_invalid_command) - 1;
|
|
|
831 }
|
|
|
832
|
|
|
833 s->args.nelts = 0;
|
|
|
834 s->buffer->pos = s->buffer->start;
|
|
|
835 s->buffer->last = s->buffer->start;
|
|
88
|
836
|
|
|
837 s->out.data = text;
|
|
|
838 s->out.len = size;
|
|
|
839
|
|
|
840 ngx_imap_send(c->write);
|
|
76
|
841 }
|
|
|
842
|
|
|
843
|
|
|
844 static ngx_int_t
|
|
|
845 ngx_imap_read_command(ngx_imap_session_t *s)
|
|
|
846 {
|
|
|
847 ssize_t n;
|
|
|
848 ngx_int_t rc;
|
|
|
849
|
|
88
|
850 n = s->connection->recv(s->connection, s->buffer->last,
|
|
|
851 s->buffer->end - s->buffer->last);
|
|
76
|
852
|
|
|
853 if (n == NGX_ERROR || n == 0) {
|
|
|
854 ngx_imap_close_connection(s->connection);
|
|
|
855 return NGX_ERROR;
|
|
|
856 }
|
|
|
857
|
|
|
858 if (n > 0) {
|
|
|
859 s->buffer->last += n;
|
|
|
860 }
|
|
|
861
|
|
|
862 if (n == NGX_AGAIN) {
|
|
|
863 if (ngx_handle_read_event(s->connection->read, 0) == NGX_ERROR) {
|
|
|
864 ngx_imap_session_internal_server_error(s);
|
|
|
865 return NGX_ERROR;
|
|
|
866 }
|
|
|
867
|
|
|
868 return NGX_AGAIN;
|
|
|
869 }
|
|
|
870
|
|
|
871 if (s->protocol == NGX_IMAP_POP3_PROTOCOL) {
|
|
|
872 rc = ngx_pop3_parse_command(s);
|
|
|
873 } else {
|
|
|
874 rc = ngx_imap_parse_command(s);
|
|
|
875 }
|
|
|
876
|
|
|
877 if (rc == NGX_AGAIN
|
|
|
878 || rc == NGX_IMAP_NEXT
|
|
|
879 || rc == NGX_IMAP_PARSE_INVALID_COMMAND)
|
|
|
880 {
|
|
|
881 return rc;
|
|
|
882 }
|
|
|
883
|
|
|
884 if (rc == NGX_ERROR) {
|
|
|
885 ngx_imap_close_connection(s->connection);
|
|
|
886 return NGX_ERROR;
|
|
|
887 }
|
|
|
888
|
|
|
889 return NGX_OK;
|
|
|
890 }
|
|
|
891
|
|
|
892
|
|
|
893 void
|
|
|
894 ngx_imap_session_internal_server_error(ngx_imap_session_t *s)
|
|
|
895 {
|
|
88
|
896 s->out = internal_server_errors[s->protocol];
|
|
|
897 s->quit = 1;
|
|
76
|
898
|
|
88
|
899 ngx_imap_send(s->connection->write);
|
|
76
|
900 }
|
|
|
901
|
|
|
902
|
|
|
903 void
|
|
|
904 ngx_imap_close_connection(ngx_connection_t *c)
|
|
|
905 {
|
|
|
906 ngx_pool_t *pool;
|
|
|
907
|
|
|
908 ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0,
|
|
|
909 "close imap connection: %d", c->fd);
|
|
|
910
|
|
88
|
911 #if (NGX_IMAP_SSL)
|
|
|
912
|
|
|
913 if (c->ssl) {
|
|
|
914 if (ngx_ssl_shutdown(c) == NGX_AGAIN) {
|
|
126
|
915 c->ssl->handler = ngx_imap_close_connection;
|
|
88
|
916 return;
|
|
|
917 }
|
|
|
918 }
|
|
|
919
|
|
|
920 #endif
|
|
|
921
|
|
132
|
922 c->destroyed = 1;
|
|
92
|
923
|
|
76
|
924 pool = c->pool;
|
|
|
925
|
|
|
926 ngx_close_connection(c);
|
|
|
927
|
|
|
928 ngx_destroy_pool(pool);
|
|
|
929 }
|
|
88
|
930
|
|
|
931
|
|
90
|
932 static u_char *
|
|
|
933 ngx_imap_log_error(ngx_log_t *log, u_char *buf, size_t len)
|
|
|
934 {
|
|
116
|
935 u_char *p;
|
|
|
936 ngx_imap_session_t *s;
|
|
|
937 ngx_imap_log_ctx_t *ctx;
|
|
90
|
938
|
|
|
939 if (log->action) {
|
|
|
940 p = ngx_snprintf(buf, len, " while %s", log->action);
|
|
|
941 len -= p - buf;
|
|
|
942 buf = p;
|
|
|
943 }
|
|
126
|
944
|
|
90
|
945 ctx = log->data;
|
|
|
946
|
|
|
947 p = ngx_snprintf(buf, len, ", client: %V", ctx->client);
|
|
|
948 len -= p - buf;
|
|
|
949 buf = p;
|
|
|
950
|
|
|
951 s = ctx->session;
|
|
|
952
|
|
|
953 if (s == NULL) {
|
|
|
954 return p;
|
|
|
955 }
|
|
|
956
|
|
190
|
957 p = ngx_snprintf(buf, len, ", server: %V", s->addr_text);
|
|
90
|
958 len -= p - buf;
|
|
|
959 buf = p;
|
|
|
960
|
|
|
961 if (s->login.len == 0) {
|
|
|
962 return p;
|
|
|
963 }
|
|
|
964
|
|
|
965 p = ngx_snprintf(buf, len, ", login: \"%V\"", &s->login);
|
|
|
966 len -= p - buf;
|
|
|
967 buf = p;
|
|
|
968
|
|
|
969 if (s->proxy == NULL) {
|
|
|
970 return p;
|
|
|
971 }
|
|
|
972
|
|
|
973 p = ngx_snprintf(buf, len, ", upstream: %V",
|
|
|
974 &s->proxy->upstream.peers->peer[0].name);
|
|
|
975
|
|
|
976 return p;
|
|
|
977 }
|
